adenocarcinoma of the renal pelvis producing alpha-fetoprotein of hepatic type and bile pigment.
Herein we wish to report our experience (4) with HER2 expression in unusual histologic variants of gastric adenocarcinomas, such as the hepatoid
adenocarcinoma (HAS) and the oncocytic adenocarcinoma, already codified as mitochondrion-rich adenocarcinoma (MRC).
adenocarcinoma (HAC) is an exceedingly rare tumor.
This tumor has different histologic patterns: typical (reticular, solid, papillary, parietal), polyvesicular, hepatoid
, glandular, and mixed.
Based on the morphology they are classified as follows: colonic (enteric) type, adenocarcinoma not otherwise specified, mucinous, signet ring cell (SRC), clear cell type, hepatoid
, and mixed forms.
1] Primary adenocarcinoma of the bladder can be histologically classified as enteric, adenocarcinoma not otherwise specified, signet ring cell, mucinous, clear cell, hepatoid
Both canalicular pCEA and albumin are more specific for HCC than Hep Par 1, but like the latter, tumors arising at other sites with hepatoid
differentiation (such as hepatoid
gastric adenocarcinomas) may also be positive for these markers.
Alpha-fetoprotein-producing adenocarcinoma of the sigmoid colon with possible hepatoid